Commutator-slotter.



(A E. AUSTIN & F. A. LACHANCE.

COMMUTATOR SLOTTER.

APPLICATION FILED MAR. 22, I9I51 Patented Mar. 14, 1916.

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G. E. AUSTIN & F. A. LACHANCE.

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APPLICATION FILED MAR. 22, |915. 1,175,676. Patented Mar. 14, 1916.

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GEORGE E. AUSTIN, OF NEW YORK, AND FREDERICK A. LACHANCE, OF BROOKLYN, NEW YORK.

COMMUTATOR-SLOTTER.

Application led March 22, 1915.

To all whom t may concern:

Be it known that we, GEORGE E. AUSTIN and FREDERICK A. LACHANCL, citizens of the United States, residing at New York and Brooklyn, respectively, in the counties of New York and Kings, respectively, and State of lNew York, have invented certain new and useful Improvements in Commutator-Slotters; and we do hereby declare the following to be a full, clear and exact description of the invention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to commutator slotters for electric motors or generators and more particularly to the removal of the insulating medum between the segments of the commutator of the armatures thereof, as said segments wear down from the friction exerted by the brushes.

An object of this invention is to provide a simplified and compact device which may be carried by the tail-stock of an armature repairing machine common to the trade.

A further object of this invention is a provision of a longitudinally movable cutting medium which may followk in line of insulation between the segments.

A further object of th's invention is an improved means for supporting a movable frame to which a driving medium is attached for driving a cutting medium carried at the end of a swinging frame.

A further object of this invention is a provision of an improved means for imparting, movement to a sliding carriage which carries the operative parts of this invention.

Further objects will be apparent from the following spec'ication, appended claims and drawings in which,

Figure 1 is a side elevation of the device constructed in accordance with this invention, Fig. 2 is an end view thereof, and Fig. 3 is a plan view thereof.

It is thought that to those skilled in the art to which this invention appertains, the features of construction will be evident and the following description will clearly define each part together with its association of the other parts.

Referring to the drawings there are showny parts of a tail-stock 10 having the usual hand Wheel 1l formed thereon and the lock nut 12 for binding the spindle Specification of Letters Patent.

Patented Mar. 14, 1916.

Serial No. 16,236.

therein. To this tail-stock are attached plates 13 as by the screws 14 and these plates have lugs 15 formed thereon to whLch a frame 16 is attached by having screws 17 pass through the lugs 18 to engage the ends of the lugs 15. A rail 19 is attached to the frame 16 `by the screws 20 and this rail is in the form of a T having its upper face .machined to form a bed 21 upon which is a carriage r1`hs carriage is provided with swung to the position shown in dotted lines in Fig. 1 when so desired where it maybe locked as by a link 31 which has one end thereof pivotally connected to the carriage 22 and its opposite end provided with a boss 32 which engages the extension 33 of one of the side rails 28. A spring 34 normally holds the link 31 in operative position. rllhe fitting 30 is bolted between the side rails 28 as at 35 and this fitting has an extension 36 from the bottom face thereof, in which bearings 37 are formed to support an arbor 38. This arbor carries a small circular saw 39 at one end thereof, and a pulley 40 at the opposite end, of which the pulley imparts motion to the arbor and the circular saw 39 serves in the removal of the insulation between the segments of a commutator. As the segments are not always properly alined with respect to the axis of the armature shaft, it is necessary that the arbor 33 has longitudinal movement to allow the saw 39 to follow the insulation between the segments of the commutator. This is accomplished by having washers 41 yieldably carried by the arbor 38 having movement in one direction only and interposing a spring 42 between the washers to normally establish a fixed position of the saw 39 with respect to the fitting 30. The pulley 40 receives a belt 43 which is driven by a pulley 44 carried by the shaft of a motor 45 which is attached to the base 29.

As it .is necessary to maintain the arbor rllhis j 38 in iXed vertical position when onceladjusted to a commutator, the base 29 has an extension 46 formed thereon through' which a Vvertical screw 17 passes and this screw is adapted to have its lower end bearupon a pedestal 48 formed on the carriage 22, while the uppei'end of said screw supports a hand wheel i9 by which rotation of the screw is had. lWhen the screw has been adjusted to properly position the arbor 38, this screw is clamped in the extension 46 by a screw which is provided with a hand wheel 51 and a collar 52 which binds against one of the extensions of the split socket which receives the screw 1LT, while the threaded end of the screw 50 engages the opposite portion of the split extension. Y

When the saw has been properly adjusted with respect to the commutator supported by the spindle of the tail-stock 1G, longitudinal movement of the carriage 22 causes this saw to traverse the length of the insulation between thersegments and this longitudinal movement is imparted through a series of levers by, which the desired throw may be had. Attaelied'to-Vthe carriage is one end of a lever 53 which has its opposite end pivoted as at 54 to one end of a link 55 vwhich is pivoted as at56v to the frame 16.

rEhe lever 53 supports a Vpin 57 upon'which al hand'wheel 58 is mounted andfthis pin passes through the s otted portion 59 of a levert() so' that the hand wheel 58 may clamp the slotted end of the lever 60 at any desired position. 'lhe opposite end of the lever 60 is pivoted as at (il to the hand lever @which has its end pivoted as at 63 to theYV frame 16. j It is apparent 'that after the desired adjustment of the hand wheel is had,

manipulation of the hand lever 62 in a swingingY direction, proportionate movement is given to the carriage 22 and likewise to the saw 39. Also,when the several parts have been'adjusted, itis only necessary to rotate the commutatore. fractionof av revolution to bring the successive line of insulation in the path of the saw 39.'

vTarious modifications may. be made within the scope of the. appendedclaims without departing from the spirit of the invention and they drawings are submitted for illustrative purposes only.

Having thus described this invention, we claim Y 1. In a commutator slotter of theclass ,described, a frame, a/bed carried by said frame, acarriage slidable longitudinally on said bed, a supplemental frame pivotally mounted upon said carriage, a cutter carried by said supplemental frame, said supplemental frame having vertical adjustment' with Vrespect to ksaid carriage and a series of levers carried by said frame and carriage `for imparting longitudinal movement to said carriage, said levers including alever having one end thereof pivoted to said carriage, its opposite end'movably carried by said frame, a hand lever pivoted to lsaid frame, and aflink connecting said hand lever with said `first mentioned lever, a connection between said link and said first mentioned' vlaterally in following the lines of insulation in a eommutator, a link pivotally secured to said carriage and yieldably secured .toV

vsaid secoiid'mentioned frame and a hand Vlever carried by said secondV mentioned frame having adjustable connection with said link. Y Y, Y

3. ln a conimutatorslotter kof the class described, a frame, a second frame detachably secured thereto, a bed formed on said second mentioned frame, a Vcarriage slidable on said bed, a supplementalframe pivoted to said carriageY for vertical movement, a llocking means carried by said.- carriage and supplemental framerto maintain; said supplemental frame in any fined position, a

prime mover carried bysaid supplemental frame, an arbor journaled. insaid supple-V mentall frame, vwashers having restricted movement in one directioncarried by said arbor, a compression spring interposed between said washers,'said washers and' spring Y permitting longitudinal movement of said arbor, Va cutter carried by said arborhaving lateral movement in following the'li-nes of insulation on commutatore; a link pivoted to said carriagev and yieldably connected to V,said second mentioned frame,.and a hand lever pivoted to said secondV mentioned fra-me having variablevconnection withv said link. i Y Y Y l VIntestimony whereof we our signatures in presence of two witnesses.

' GEO. E. AUSTIN. 1

FREDERICK Y A. LACHANCE. j ldlitnesses: Y* Y vHUGO Moon, A

GEORGE L. THORN.

Copies of this patent may be obtained for rive cents each, by addressing thedcommssoner OLIPatentS, Washington, 11C,

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